<template>
  <div style="margin-top: 16px">
    <el-form-item label="脚本格式">
      <el-input v-model="scriptTaskForm.scriptFormat" clearable @input="updateElementTask()" @change="updateElementTask()" />
    </el-form-item>
    <el-form-item label="脚本类型">
      <el-select v-model="scriptTaskForm.scriptType">
        <el-option label="内联脚本" value="inline" />
        <el-option label="外部资源" value="external" />
      </el-select>
    </el-form-item>
    <el-form-item label="脚本" v-show="scriptTaskForm.scriptType === 'inline'">
      <el-input
        v-model="scriptTaskForm.script"
        type="textarea"
        resize="vertical"
        :autosize="{ minRows: 2, maxRows: 4 }"
        clearable
        @input="updateElementTask()"
        @change="updateElementTask()"
      />
    </el-form-item>
    <el-form-item label="资源地址" v-show="scriptTaskForm.scriptType === 'external'">
      <el-input v-model="scriptTaskForm.resource" clearable @input="updateElementTask()" @change="updateElementTask()" />
    </el-form-item>
    <el-form-item label="结果变量">
      <el-input v-model="scriptTaskForm.resultVariable" clearable @input="updateElementTask()" @change="updateElementTask()" />
    </el-form-item>
  </div>
</template>

<script lang="ts" setup>
  defineOptions({ name: 'ScriptTask' })
  const props = defineProps({
    id: String,
    type: String
  })

  const defaultTaskForm = ref({
    scriptFormat: '',
    script: '',
    resource: '',
    resultVariable: ''
  })
  const scriptTaskForm = ref<any>({})
  const bpmnElement = ref()

  const bpmnInstances = () => (window as any)?.bpmnInstances

  const resetTaskForm = () => {
    for (let key in defaultTaskForm.value) {
      let value = bpmnElement.value?.businessObject[key] || defaultTaskForm.value[key]
      scriptTaskForm.value[key] = value
    }
    scriptTaskForm.value.scriptType = scriptTaskForm.value.script ? 'inline' : 'external'
  }

  const updateElementTask = () => {
    let taskAttr = Object.create(null)
    taskAttr.scriptFormat = scriptTaskForm.value.scriptFormat || null
    taskAttr.resultVariable = scriptTaskForm.value.resultVariable || null
    if (scriptTaskForm.value.scriptType === 'inline') {
      taskAttr.script = scriptTaskForm.value.script || null
      taskAttr.resource = null
    } else {
      taskAttr.resource = scriptTaskForm.value.resource || null
      taskAttr.script = null
    }
    bpmnInstances().modeling.updateProperties(toRaw(bpmnElement.value), taskAttr)
  }

  watch(
    () => props.id,
    () => {
      bpmnElement.value = bpmnInstances().bpmnElement
      nextTick(() => {
        resetTaskForm()
      })
    },
    { immediate: true }
  )

  onBeforeUnmount(() => {
    bpmnElement.value = null
  })


</script>
